CN214205364U - Integrated control device of power supply system - Google Patents

Abstract

The application provides a power system integrated control device, this device is used for at least controlling a plurality of power systems, includes: a processing circuit and a power supply circuit; the output end of the processing circuit is connected with the control end of the power supply circuit, the output end of the power supply circuit is connected with an external load, and the power supply circuit outputs a power supply signal to the external load under the control of the processing circuit; the power supply circuit comprises a rectifying circuit, an inverter circuit and a battery charging and discharging circuit, wherein the input end of the rectifying circuit is connected with an external power supply end, the output end of the rectifying circuit is respectively connected with the input end of the inverter circuit and the battery charging and discharging circuit, the input end of the inverter circuit is connected with the battery charging and discharging circuit, and the output end of the inverter circuit is connected with the driving end of an external load; the inverter circuit comprises two groups of parallel direct current-to-alternating current modules, the direct current-to-alternating current modules comprise three groups of parallel switch bridge arms, and the bridge arms comprise two series-connected SiC MOS switches, so that the response speed and the control precision of the power supply system can be improved.

Description

Integrated control device of power supply system

Technical Field

The present disclosure relates to the field of automation technologies, and in particular, to an integrated control apparatus and method for a power system, and a storage medium.

Background

The gantry crane is a variant of a bridge crane, is called a gantry crane, and is widely applied to loading and unloading operations of outdoor goods yards, stock yards and bulk goods. In the prior art, as a diesel generator is gradually cancelled in a port, the environmental pollution of the port and the wharf is reduced, and a standby power supply is changed into a lithium battery. In order to meet the application conditions of the crane, the battery needs to be matched with at least three power supply systems to meet the process requirements of the crane, so that the existing crane control system adopts relatively decentralized control, the whole system is more and complicated in wiring, the reliability of the system is further reduced, and the maintenance difficulty is high, so that a technical scheme capable of solving the technical problems is needed.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application mainly solved provides a power supply system integrated control device, can improve power supply system's response speed and control accuracy.

In order to solve the technical problem, the application adopts a technical scheme that: there is provided a power supply system integrated-control apparatus for controlling at least a plurality of power supply systems for outputting a set power supply signal to an external load, the apparatus including: a processing circuit and a power supply circuit;

the output end of the processing circuit is connected with the control end of the power supply circuit, the output end of the power supply circuit is connected with an external load, and the power supply circuit outputs the power supply signal to the external load under the control of the processing circuit;

the power supply circuit comprises a rectifying circuit, an inverter circuit and a battery charging and discharging circuit, wherein the input end of the rectifying circuit is connected with an external power supply end, the output end of the rectifying circuit is respectively connected with the input end of the inverter circuit and the battery charging and discharging circuit, the input end of the inverter circuit is connected with the battery charging and discharging circuit, and the output end of the inverter circuit is connected with the driving end of the external load so as to output the power supply signal to the external load under the control of the processing circuit;

the inverter circuit comprises two groups of direct current-to-current modules which are connected in parallel, the direct current-to-current modules comprise three groups of switch bridge arms which are connected in parallel, and the bridge arms comprise two SiCMOS switches which are connected in series.

Furthermore, the battery charging and discharging circuit comprises at least one DC-DC module, the third end of each DC-DC module is connected with an external battery, and the fourth end of each DC-DC module is respectively connected with the input end of the direct current-to-alternating current module and the output end of the rectifying circuit.

Furthermore, the processing circuit includes a first processing chip, a second processing chip and a third processing chip that can communicate with each other, an output end of the first processing chip is connected to control ends of the two sets of DC-to-ac modules, and the second processing chip and the third processing chip are respectively connected to one DC-DC module.

Further, the power supply circuit further comprises a dc output port, and the dc output port is respectively connected to the output end of the rectifying circuit and the second end of the battery charging and discharging circuit to output a dc power supply signal to the external load.

Furthermore, the power circuit further comprises a filter capacitor connected with the output end of the rectifying circuit, and the filter capacitor is connected with the positive and negative buses so as to filter the high-voltage direct current output by the rectifying circuit.

Furthermore, the power circuit further comprises a buffer circuit, and the buffer circuit is connected with the rectifying circuit and the filter capacitor to protect the filter capacitor.

Still further, the buffer circuit comprises a protection resistor and a relay switch which are arranged in parallel, and the control end of the relay switch is connected with the processing circuit so as to be closed or opened under the control of the processing circuit.

Furthermore, the power circuit further comprises a filter circuit, and the filter circuit is connected with the inverter circuit and the external load so as to filter the power signal output to the external load.

Furthermore, the integrated control device of the power supply system further comprises an electromagnetic compatibility circuit and a lightning protection circuit, wherein the electromagnetic compatibility circuit and the lightning protection circuit are connected with the external power supply and the rectification circuit so as to provide lightning protection for the power supply circuit.

Furthermore, the device also comprises a heat dissipation module and two groups of reactors, wherein one reactor is connected with the output end of the inverter circuit and the first filter circuit, the other reactor is connected with the battery charging and discharging circuit and the second filter circuit, the heat dissipation module comprises a flow guide channel for cooling liquid to flow, and one side of the flow guide channel is respectively abutted to at least one of the direct current-to-alternating current module, the battery charging and discharging circuit and the two groups of reactors.

The beneficial effect of this application is: different from the situation of the prior art, the power supply system integrated control device provided by the application is connected with the control end of the power supply circuit through the output end of the processing circuit, and the output end of the power supply circuit is connected with an external load so as to output a power supply signal to the external load under the control of the processing circuit; the power supply circuit comprises a rectifying circuit, an inverter circuit and a battery charging and discharging circuit, wherein the input end of the rectifying circuit is connected with an external power supply end, the output end of the rectifying circuit is respectively connected with the input end of the inverter circuit and the battery charging and discharging circuit, the input end of the inverter circuit is connected with the battery charging and discharging circuit, and the output end of the inverter circuit is connected with the driving end of an external load so as to output a power supply signal to the external load under the control of the processing circuit; the inverter circuit comprises two groups of parallel direct current-to-current modules, the direct current-to-current modules comprise three groups of parallel switch bridge arms, the bridge arms comprise two series-connected SiC MOS switches, namely, the power supply system integrated control device provided by the application realizes rectification circuits distributed in different power supply systems, a battery charging and discharging circuit and an inverter circuit for inverter power supply are integrated in one device, and the power supply system integrated control device with a simpler connection structure can realize integrated control on a plurality of power supply systems. Meanwhile, in the technical scheme provided by the application, the high-frequency control of the power supply system can be better realized by adopting the direct current-to-alternating current module comprising the SiC MOS switch, so that the response speed and the control precision of the power supply system are improved, the requirements on the inductor and the capacitor in the power supply system are reduced, and the size and the weight of the integrated control device of the power supply system are greatly reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

fig. 1 is a schematic structural diagram of an embodiment of an integrated control device of a power system according to the present application;

fig. 2 is a schematic structural diagram of another embodiment of an integrated control device of a power system according to the present application;

fig. 3 is a schematic structural diagram of a driving circuit in an integrated control device of a power system according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram illustrating an embodiment of a processing circuit in an integrated control device of a power system according to the present application;

FIG. 5 is a schematic structural diagram of another embodiment of an integrated control apparatus of a power system according to the present application;

FIG. 6 is a schematic structural diagram of a power system integrated control apparatus according to still another embodiment of the present application;

FIG. 7 is a schematic diagram of a horizontal cross-sectional structure of another embodiment of an integrated control device of a power system according to the present application;

fig. 8 is a schematic flowchart illustrating an embodiment of an integrated control method for a power system according to the present application;

FIG. 9 is a schematic flow chart illustrating another embodiment of a power system integrated control method according to the present application;

FIG. 10 is a schematic flow chart illustrating a power system integrated control method according to another embodiment of the present disclosure;

fig. 11 is a schematic flowchart of another embodiment of a power system integrated control method according to the present application;

FIG. 12 is a schematic flow chart illustrating a power system integrated control method according to another embodiment of the present disclosure;

fig. 13 is a schematic flowchart illustrating a power system integrated control method according to still another embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of an embodiment of an integrated control device of a power system according to the present application;

fig. 15 is a schematic structural diagram of an embodiment of a computer-readable storage medium according to the present application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be noted that, the power supply system integrated control device provided by the present application is at least applied to a crane site. Specifically, the power supply system integrated control device is used for outputting a power supply signal conforming to a drive control instruction to an external load when receiving the drive control instruction output by the upper computer so as to supply power to the external load. The upper computer is connected with the power supply system integrated control device and can perform data communication, and the upper computer is used for controlling the crane and at least comprises PLC equipment. The power supply signal refers to an electrical signal output by the power supply system integrated control device and used for supplying power to an external load.

The dc-to-ac module described below is used to convert the received dc power into ac power, or invert the dc power into ac power and output the ac power to an external load. The external loads at least comprise loads such as devices needing power supply in a cab, a lift truck, a tire steering motor and the like, and a DC-AC module is used for representing a DC-AC module in the attached drawings of the specification.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an integrated control device 100 of a power system according to the present application. In the present embodiment, the power system integrated control apparatus 100 provided in the present application is at least used for performing integrated control on a plurality of power systems, and is used for outputting a set power signal to the external load 102 and/or the external load 103, so as to supply power to the external load 102 and/or the external load 103. It should be noted that the power supply system integrated control device 100 includes a dc output port 40 and a three-phase ac output port, the dc output port 40 is connected to an external load 103, and the three-phase ac output port (not shown) is connected to an external load 102, so as to supply power to different loads by using an ac signal and a dc signal, respectively.

In the present embodiment, the power system integrated control apparatus 100 provided by the present application includes a processing circuit 10 and a power circuit 30, wherein an input terminal of the power circuit 30 is connected to an external power source terminal 101, a control terminal of the power circuit 30 is connected to the processing circuit 10, and an output terminal of the power circuit 30 is connected to an external load 102 and/or an external load 103, so as to output a set power signal to the external load 102 and/or the external load 103 under the control of the processing circuit 10.

Wherein, the control instruction output end of the processing circuit 10 is connected to the control end of the power circuit 30 and is used for outputting a control instruction to the power circuit 30, the three-phase ac output port in the power circuit 30 is connected to the power end of the external load 102, the dc output port 40 in the power circuit 30 is connected to the power end of the external load 103, and the power circuit 30 outputs a power signal corresponding to the control instruction to the external load 102 and/or the external load 103 under the control of the processing circuit 10. Specifically, the processing circuit 10 may control the power circuit 30 to output power signals with different voltages or power signals with different frequencies by outputting a control instruction to the power circuit 30, or adjust the power signals output by the power circuit 30 to the external load 102 and/or the external load 103 by adjusting the control instruction output to the power circuit 30. Since the power circuit 30 includes a plurality of different circuit modules, the processing circuit 10 is correspondingly connected to the control terminals of the circuit modules that need to be controlled in the power circuit 30.

Further, the power supply circuit 30 includes a rectifying circuit 31, an inverter circuit 32, and a battery charging and discharging circuit 38. The input end of the rectifying circuit 31 is connected with an external power supply end 101, the output end of the rectifying circuit 31 is respectively connected with the input end of the inverter circuit 32 and the battery charging and discharging circuit 38, and the rectifying circuit 31 is used for rectifying alternating current input by the external power supply end 101 into direct current and outputting the direct current to the battery charging and discharging circuit 38 so as to charge a battery connected with the battery charging and discharging circuit 38; or, the rectifier circuit 31 is further configured to output the direct current to the inverter circuit 32, so that the inverter circuit 32 converts the direct current into an alternating current with a set voltage, and further supplies power to the external load 102 connected to the inverter circuit 32; still alternatively, the rectifier circuit 31 is further configured to directly output the dc power to the external load 103 through the dc output port 40, so as to supply power to the external load 103 connected to the dc output port 40.

The battery charging and discharging circuit 38 is configured to convert a direct current into a direct current with different parameters, and specifically may be configured to implement energy exchange between a battery and a bus connected to the battery charging and discharging circuit 38, and charge and discharge the connected electric energy storage circuit 33, where a DC-DC module is used as the direct current conversion circuit in the drawings of this application. The electric energy storage circuit 33 may be a device independent from the power system integrated control apparatus 100 provided in the present application, and is connected to the power system integrated control apparatus 100 to obtain electric energy and store or discharge the electric energy to the outside. In other embodiments, the power storage circuit 33 may also be integrated into the power system integrated control apparatus 100 provided in the present application, and is not particularly limited herein, and is set according to actual requirements.

The electric energy storage circuit 33 includes at least one group of rechargeable batteries, and the corresponding battery charging and discharging circuit 33 includes at least one DC-DC module. The third end of each DC-DC module is connected with an external battery, and the fourth end of each DC-DC module is respectively connected with the input end of the direct current-to-alternating current module and the output end of the rectifying circuit.

Referring to fig. 2, taking the example that the electric energy storage circuit 33 includes two sets of rechargeable batteries 331 and 332 connected in parallel, the types of the batteries 331 and 332 include rechargeable lithium batteries or secondary batteries. Correspondingly, when the electric energy storage circuit 33 includes two sets of rechargeable batteries 331 and batteries 332 connected in parallel, the charging and discharging circuit 33 correspondingly includes two DC- DC modules 382 and 381 connected in parallel, a third end of each DC-DC module is connected to a battery, and a fourth end of each DC-DC module is connected to an input end of the DC-to-ac module and an output end of the rectifying circuit 31, that is, the fourth end of the DC-DC module is connected to an input end of the DC-to-ac module, and the fourth end of the DC-DC module is further connected to an output end of the rectifying circuit 31.

The input end of the inverter circuit 32 is connected to the output end of the rectifier circuit 31 and the second end of the battery charging/discharging circuit 38, the output end of the inverter circuit 32 is connected to the driving end of the external load 102, and the inverter circuit 32 outputs a power supply signal to the external load 102 under the control of the processing circuit 10. The parameters of the power signal output by the inverter circuit 32 to the external load 102 may be adjusted under the control of the processing circuit 10, and the power signal output by the inverter circuit 32 is an ac signal. The external load 102 connected to the output terminal of the inverter circuit 32 includes at least a steering motor, an air conditioner, a lighting system, and the like.

Referring to fig. 2 to 4, fig. 2 is a schematic structural diagram of another embodiment of a power system integrated control device of the present application, fig. 3 is a schematic structural diagram of a power circuit in a power system integrated control device of the present application in one embodiment, and fig. 4 is a schematic structural diagram of a processing circuit in a power system integrated control device of the present application in one embodiment.

Further, the inverter circuit 32 includes two sets of dc-to- ac modules 321 and 322 connected in parallel, input ends of the dc-to-ac module 321 and the dc-to-ac module 322 are both connected to the second end of the battery charging and discharging circuit 38, input ends of the dc-to-ac module 321 and the dc-to-ac module 322 are also connected to an output end of the rectifier circuit 31, output ends of the dc-to-ac module 321 and the dc-to-ac module 322 are respectively connected to the external load 102, and control ends of the dc-to-ac module 321 and the dc-to-ac module 322 are respectively connected to the processing circuit 10, so as to output a set power signal to the external load 102 under the control of the processing circuit 10. In one embodiment, under the control of the processing circuit 10, the inverter circuit 32 is configured to convert the dc power input by the rectifying circuit 31 into a set ac power and output the ac power to the external load 102. In another embodiment, under the control of the processing circuit 10, the inverter circuit 32 is configured to convert the dc power output by the battery charging and discharging circuit 38 into a set ac power and output the ac power to the external load 102. It should be noted that, in the current embodiment, the dc-to-ac module 321 and the dc-to-ac module 322 may be used to respectively supply power to an external load, and the number of the external loads 102 illustrated in fig. 2 corresponds to two devices requiring ac power supply.

Further, please refer to fig. 5 in combination, where fig. 5 is a schematic structural diagram of another embodiment of an integrated control device of a power system according to the present application. In the present embodiment, the structure included in the dc-to-ac module 321 is further described, and the structure of the dc-to-ac module 322 can be specifically and directly referred to fig. 5 and the corresponding descriptions below.

The dc-to-ac module 321 includes three parallel switch arms 3211, 3212, and 3213. Each switch leg 3211 includes two SiC MOS switches connected in series. As illustrated in fig. 5, the switch leg 3211 includes SiC MOS switches Q1 and Q2 connected in series, the switch leg 3212 includes SiC MOS switches Q3 and Q4 connected in series, and the switch leg 3213 includes SiC MOS switches Q5 and Q6 connected in series. It is understood that in other embodiments, the switch legs in the dc-to- ac modules 321 and 322 may be formed by connecting other types of switch devices in series, for example, in another embodiment, the switch legs included in the dc-to-ac module 321 may be formed by connecting two IGBT switches in series. The parameters selected by the SiC MOS switch are not limited, and are specifically adjusted according to actual needs.

Further, the rectifying circuit 31 includes three groups of diode bridge arm 311, diode bridge arm 312, and diode bridge arm 313 connected in parallel, and each diode bridge arm includes two groups of diodes connected in series. Specifically, diode leg 311 includes diodes connected in series as D1 and D2, diode leg 312 includes diodes connected in series as D3 and D4, and diode leg 313 includes diodes connected in series as D5 and D6. The parameters of the diodes specifically included in the rectifying circuit 31 are not limited, and may be specifically selected and adjusted according to actual needs.

The power system integrated control device 100 provided in the embodiment corresponding to fig. 1 of the present application and including the processing circuit 10 and the power circuit 30 is connected to the control terminal of the power circuit 30 through the output terminal of the processing circuit 10, and the output terminal of the power circuit 30 is connected to the external load 102 and/or the external load 103 to output the power signal to the external load 102 and/or the external load 103 under the control of the processing circuit 10; the power circuit 30 comprises a rectifying circuit 31, an inverter circuit 32 and a battery charging and discharging circuit 38, wherein the input end of the rectifying circuit 31 is connected with an external power supply end 101, the output end of the rectifying circuit 31 is respectively connected with the input end of the inverter circuit 32 and the battery charging and discharging circuit 38, the input end of the inverter circuit 32 is connected with the battery charging and discharging circuit 38, and the output end of the inverter circuit 32 is connected with the driving end of an external load 102 so as to output a power supply signal to the external load 102 under the control of the processing circuit 10; the inverter circuit 32 includes two sets of parallel dc-to-ac modules 321 and 322, and each of the dc-to-ac modules 321 and 322 includes three sets of parallel switch arms, each of which includes two SiC MOS switches connected in series. It can be known from this that the power system integrated control device 100 provided in the present embodiment of the present application realizes that the rectifier circuits, the battery charging and discharging circuits, and the inverter circuits for inverter power supply, which are distributed in different power systems, are integrated into one device, and the power system integrated control device 100 with a relatively simple connection structure can realize integrated control of the power system. Meanwhile, the direct current-to-alternating current module 321 and the direct current-to-alternating current module 322 which are composed of SiC MOS switches are adopted, so that high-frequency control of the power supply system can be well realized, the response speed and the control precision are further improved, the requirements on inductance and capacitance in the power supply system are reduced, and the size and the weight of the power supply system integrated control device 100 are greatly reduced.

Further, referring to fig. 2 and fig. 3 again, in an embodiment, the power circuit 30 in the integrated power system control device 100 provided by the present application further includes an electromagnetic compatibility circuit 34 and a lightning protection circuit 35.

Wherein, the electromagnetic compatibility circuit 34 and the lightning protection circuit 35 are connected between the external power end 101 and the rectification circuit 31 to provide lightning protection and compatibility protection of the battery 331 for the power circuit 30. The emc circuit 34 is used to make the power system integrated control apparatus 100 operate in its electromagnetic environment as required, and at the same time, does not generate intolerable electromagnetic interference to any device or device in its environment. The lightning protection circuit 35 is used to provide lightning protection for the power system integrated control device 100. It should be noted that, in other embodiments, the adjusting circuit structure may be that the external power source terminal 101 is connected to the electromagnetic compatibility circuit 34, and the lightning protection circuit 35 is connected to the electromagnetic compatibility circuit 34 and the rectifying circuit 31 according to actual needs.

In another embodiment, the lightning protection circuit 35 and the electromagnetic compatibility circuit 34 may be compatible together to form an electromagnetic compatibility and lightning protection circuit according to actual requirements, an input terminal of the electromagnetic compatibility and lightning protection circuit is connected to the external power source terminal 101, an output terminal of the electromagnetic compatibility and lightning protection circuit is connected to an input terminal of the rectification circuit 31, and the structural layout and adjustment may be performed according to actual requirements.

Further, please refer to fig. 2 to fig. 6, wherein fig. 6 is a schematic structural diagram of a power system integrated control device according to another embodiment of the present application, and specifically, fig. 6 specifically shows a dc conversion circuit and a circuit structure closely related thereto.

Further, a first end of the battery charging and discharging circuit 38 is connected to the external power storage circuit 33, a second end of the battery charging and discharging circuit 38 is connected to the output end of the rectifying circuit 31 to convert the high-voltage direct current output by the rectifying circuit 31 into low-voltage direct current, so as to charge the external power storage circuit 33, and a second end of the battery charging and discharging circuit 38 is also connected to the input end of the inverter circuit 32, so that when the external power storage circuit 33 discharges, the battery charging and discharging circuit 38 is further configured to convert the low-voltage direct current output by the external power storage circuit 33 into high-voltage direct current to be output to the inverter circuit 32, so as to supply power to the external load 102 connected to the inverter circuit 32.

As illustrated in fig. 2, when the electric energy storage circuit 33 includes two sets of batteries 331 and 332, correspondingly, the battery charging and discharging circuit 38 includes two DC- DC modules 381 and 382 arranged in parallel, wherein a third terminal of the DC-DC module 381 is connected to the battery 331, a third terminal of the DC-DC module 382 is connected to the battery 332, and fourth terminals of the DC-DC module 381 and the DC-DC module 382 are respectively connected to an input terminal of the direct current transfer module 321 and an output terminal of the rectifying circuit 31.

Further, referring to fig. 6, fig. 6 illustrates a structure included in the DC-DC module 381 by taking the DC-DC module as an example. The DC-DC module 381 includes three parallel switch bridge arms 3811, 3812 and 3813. Each switching leg includes two SiC MOS switches connected in series, as illustrated in fig. 6, switching leg 3811 includes SiC MOS switch Q7 and SiC MOS switch Q8 connected in series, switching leg 3812 includes SiC MOS switch Q9 and SiC MOS switch Q10 connected in series, and switching leg 3813 includes SiC MOS switch Q11 and SiC MOS switch Q12 connected in series. The control end of each SiC MOS switch is connected to the processing chip corresponding to the current DC-DC module 381, and if the current DC-DC module 382 is connected to the second processing chip 12, the control end of each SiC MOS switch included in the current DC-DC module 382 is connected to the control end of the second processing chip 12; if the current DC-DC module 381 is connected to the third processing chip 13, the control terminal of each SiC MOS switch included in the DC-DC module 381 is connected to the control terminal of the third processing chip 13. It is understood that in other embodiments, the switching legs 3811, 3812 and 3813 can be formed by connecting other types of switching devices in series, for example, in another embodiment, the switching legs included in the dc-to-ac module 321 and/or the dc-to-ac module 322 can be formed by connecting two IGBT switches in series. The parameters selected by the SiC MOS switch or the IGBT switch are not limited, and are specifically adjusted according to actual needs.

Still further, in the power supply system integrated control device 100 provided by the present application, the DC-DC module 381 and the DC-to-ac module 321 (and the DC-to-ac module 322) both adopt a modular design, and corresponding power supply modules in the DC-DC module 381 and the DC-to-ac module 321 (and the DC-to-ac module 322) adopt the same design, thereby improving the versatility of the power supply system integrated control device 100, and simultaneously enabling the power supply modules (where the power supply modules include the DC-DC module 381, the DC-DC module 382, the DC-to-ac module 321, and the DC-to-ac module 322) to be used in parallel, thereby improving the flexibility, also increasing the power coverage, and simultaneously simplifying the installation and maintenance work because the power supply modules can be independently disassembled.

Referring again to fig. 4, the structure included in the processing circuit 10 is highlighted in fig. 4.

The processing circuit 10 includes a first processing chip 11, a second processing chip 12, and a third processing chip 13 capable of communicating with each other, an output terminal of the first processing chip 11 is connected to control terminals of the two sets of DC-to- ac modules 321 and 322, and the second processing chip 12 and the third processing chip 13 are respectively connected to a DC-DC module. Further, the first processing chip 11, the second processing chip 12, and the third processing chip 13 include DSP chips. In an embodiment, the second processing chip 12 is directly connected to the first processing chip 11, and the third processing chip 13 is directly connected to the first processing chip 11, that is, the second processing chip 12 and the third processing chip 13 respectively communicate with the first processing chip 11 directly. In another embodiment, the second processing chip 12 is directly connected to the first processing chip, and the third processing chip 13 is indirectly connected to the first processing chip through the second processing chip, that is, the third processing chip 13 communicates with the first processing chip 11 through the second processing chip 12.

The power circuit 30 further includes a dc output port 40, and the dc output port 40 is respectively connected to the output terminal of the rectifying circuit 31 and the second terminal of the battery charging and discharging circuit 38, so as to output a dc power signal to an associated external load 102 (not shown). The external load 102 may include a plurality of devices requiring a dc signal to supply power.

The power circuit 30 further includes a filter capacitor 37 connected to the output end of the rectifying circuit 31, and the filter capacitor 37 is connected to the positive bus AB and the negative bus CD to filter the high-voltage dc output by the rectifying circuit 31.

The power circuit 30 further includes a buffer circuit 36, and the buffer circuit 36 connects the rectifying circuit 31 and the filter capacitor 37 to protect the filter capacitor 37 when there is a large change in the bus voltage, so as to prevent the filter capacitor 37 from being broken down due to an excessive voltage.

Further, the snubber circuit 36 includes a protection resistor R1 and a relay switch K1 arranged in parallel, and a control terminal of the relay switch K1 is connected to the processing circuit 10 to be closed or opened under the control of the processing circuit 10. When the external power supply end 101 is connected with the power supply integrated control device 100, since the bus voltage has a relatively obvious change, the processor controls the relay switch K1 to be switched off for protecting the filter capacitor 37, so that the protection resistor R1 is connected into the circuit; when the processing circuit 10 obtains the voltage on the bus through sampling and judgment, the processing circuit controls the relay switch K1 to be closed, and then the protection resistor R1 is short-circuited to charge the electric energy storage circuit 33.

Further, referring to fig. 5 and fig. 6, the power circuit 30 further includes a first filter circuit 391 and a second filter circuit 392, wherein the first filter circuit 391 is connected to the inverter circuit 32 and the external load 102 to filter the power signal output to the external load 102, and the second filter circuit 392 is connected to the battery charging/discharging circuit 38 and the electric energy storage circuit 33 to filter the current signal input to the electric energy storage circuit 33 or the current signal output from the electric energy storage circuit 33. Further, the first filter circuit 391 includes three sets of capacitors C arranged in parallel₁、C₂And C₃The second filter circuit 392 comprises three sets of capacitors C arranged in parallel₄、C₅And C₆。

Further, please refer to fig. 5 to 7, wherein fig. 7 is a schematic horizontal cross-sectional structure diagram of another embodiment of the integrated control device of a power system according to the present application. The power supply system integrated control device 100 provided by the present application further includes a heat dissipation module 103 and two sets of reactors 51 and 52. One reactor 51 is connected with the output end of the inverter circuit 32 and the first filter circuit 391, the other reactor 52 is connected with the battery charging and discharging circuit 38 and the second filter circuit 392, and the heat dissipation module 103 is abutted with at least one of the dc-to-ac module (321 and 322), the battery charging and discharging circuit 38 and the two reactors (51 and 52) to take away heat generated by the abutted devices in the operation process, so that the power supply system integrated control device 100 is cooled. The dc-to-ac modules (321 and 322), the battery charging and discharging circuit 38 and the two sets of reactors (51 and 52) may be abutted against different side surfaces of the heat dissipation module 103, and are specifically arranged according to an actual product layout, which is not limited herein.

Further, as shown in fig. 7, the heat dissipation module 103 includes a flow guiding channel through which the cooling fluid can flow, and one side of the flow guiding channel is abutted to at least one of the inverter circuit 32 (the dc-to-ac module 321 and/or the dc-to-ac module 322), the battery charging and discharging circuit 38, and the two sets of reactors (51 and 52), so as to take away heat generated when each device abutted thereto runs through the flowing cooling fluid, thereby implementing cooling processing on the power supply system integrated control device 100. It should be noted that fig. 7 shows a cross-sectional view that only one side of the current guiding channel abuts against the inverter circuit 32, and the battery charging and discharging circuit 38 and the two sets of reactors (51 and 52) may abut against different sides of the current guiding channel, so that they are not shown in fig. 7.

Further, when the DC-ac module 321 includes a SiC MOS switch, or when the DC-DC module includes a SiC MOS switch, one side of the flow guide channel is directly abutted against any one of the outer surfaces of the SiC MOS switch to take away heat generated when the SiC MOS switch operates by the flowing coolant.

Furthermore, one side of the diversion channel is also abutted against the DC conversion circuit (the DC-DC module 382 and/or the DC-DC module 381) to take away heat generated by the DC conversion circuit during operation, so as to cool the power system integrated control device 100. It is understood that, in other embodiments, the layout of the heat dissipation module 103 is specifically set according to the actual application layout requirement of the power system integrated control device 100, and specifically, a good heat dissipation effect is taken as a layout reference.

Referring to fig. 8, fig. 8 is a schematic flowchart illustrating an embodiment of an integrated control method for a power system according to the present application. In the present embodiment, the execution subject of the method provided by the present application is a power system integrated control device, the power system integrated control device includes at least one battery charging and discharging circuit, the battery charging and discharging circuit is connected with an external battery, the at least one battery charging and discharging circuit is controlled by a processing circuit, and the battery charging and discharging circuit can charge or discharge the battery under the control of the processing circuit. Wherein, in some embodiments, the processing circuitry may refer to portions of the processing circuitry. It is to be understood that in other embodiments, the processing circuitry may also refer to the processing circuitry as a whole.

Further, the processing circuit comprises a main controller and a non-main control common controller, wherein the main controller plays a main control role, the main controller corresponds to the first processing chip of the hardware part, and the common controller corresponds to the second processing chip and/or the third processing chip of the hardware part. At least one battery charging and discharging circuit is controlled by a common controller in the processing circuit. The number of the main controller is one, the number of the common controllers can be matched with the number of the battery charging and discharging circuits, when the number of the battery charging and discharging circuits is multiple, the number of the common controllers is correspondingly set to be multiple, each battery charging and discharging circuit is independently controlled by one common controller, and each common controller can communicate with the main controller.

In the current embodiment, the method provided by the present application includes:

s810: and when a power-on instruction is acquired, judging whether the power supply system meets the power-on condition.

In the current embodiment, when a user needs the power supply system to supply power to the external load according to actual needs, the user can input a power-on instruction to the power supply system integrated control device by closing the power-on switch, and the power supply system integrated control device can further judge whether the current power supply system meets the power-on condition after acquiring the power-on instruction, and determine whether to supply power to the external load according to a judgment result.

In another embodiment, the user may also close the power-on switch by triggering the setting software program to send a power-on instruction to the power system integrated control device, and the power system integrated control device further determines whether the power system satisfies the power-on condition after acquiring the power-on instruction. It should be noted that, when the power system and the power system integrated control device are integrated into a whole, that is, integrated into a power system integrated control system, step S810 may also be understood as obtaining a power-on instruction, and determining whether the power system integrated control system meets the power-on condition.

Furthermore, the power-on switch at least comprises a high-voltage closing button, a user can send a power-on instruction to the power system integrated control device by pressing the high-voltage closing button, and the user can trigger the high-voltage closing button to be closed by triggering a set software program, so as to send the power-on instruction to the power system integrated control device. Or the user can remotely trigger the high-voltage switch-on button to be switched on through the terminal, wherein the terminal can be communicated with the power supply system integrated control device.

The power-on switch can be directly connected with the power system integrated control device, and correspondingly, the power-on switch can be closed and then a power-on instruction is directly sent to the power system integrated control device. In another embodiment, the power-on switch may also be indirectly connected to the power system integrated control device through the upper computer, that is, the upper computer sends a power-on instruction to the power system integrated control device after the power-on switch is closed, and the power system integrated control device further determines whether the power system currently satisfies the power-on condition after acquiring the power-on instruction. When the upper computer is a PLC device, the power-on switch can be closed, and then a power-on instruction is sent to the power supply system integrated control device through the PLC device, so that the power supply system integrated control device judges whether the power supply system meets the power-on condition.

Wherein, the power supply system can be applied to a crane site as described above, and the power supply system at least comprises at least part of the driving circuit in the integrated control device of the power supply system in the current embodiment as described above in any one of fig. 1 to 7.

Wherein the power-on condition at least comprises: and the power supply system integrated control device is used for controlling the charging and discharging of the bus, and the charging and discharging of the bus are carried out according to the charging and discharging state of the bus. Specifically, the power-on condition may be set and adjusted according to actual application requirements, which is not limited herein.

Further, when the power-on condition includes whether the bus voltage of the power system integrated control device is stable, the method provided by the application further comprises monitoring the bus voltage in the power system integrated control device and judging whether the bus voltage in the power system integrated control device is stable; if the power-on condition includes whether the battery charging and discharging circuit is in an operable state, the method provided by the application further includes: judging whether the battery charging and discharging circuit is in an operable state; if the power-on condition includes whether the bus is charged or not, the method provided by the application comprises the following steps: whether the bus is charged or not is judged by detecting the bus voltage.

S820: if so, switching the state of the system to a power-on preparation state, and further judging whether an operation signal of at least one battery charging and discharging circuit in the system is effective.

If it is determined in step S810 that the power supply system satisfies the power-on condition, the state of the power supply system is further switched to a power-on ready state. And after the power supply system is switched to a power-on preparation state, whether the operation signal of at least one battery charging and discharging circuit in the power supply system is effective is further judged.

In the technical scheme provided by the application, the power-on ready state is a state different from the power-on ready state, and when the power system is in the power-on ready state, it indicates that the power system initially meets the power-on condition, but it needs to be further determined whether the power system meets the set condition. In the process of powering on the power supply system, the power supply system is switched into a power-on ready state and a power-on ready state in sequence according to the judgment result of the current condition of the power supply system.

Wherein, judging whether the operation signal of the battery charge-discharge circuit is effective comprises: and judging whether the battery charging and discharging circuit can normally receive the electric signal, judging whether the battery charging and discharging circuit can normally convert the electric signal, and judging whether the battery charging and discharging circuit converts the flowing electric signal into at least one of direct currents with set parameters according to a control instruction.

S830: and if the operation signal of at least one battery charging and discharging circuit in the system is judged to be valid, calculating a first target voltage corresponding to the at least one battery charging and discharging circuit.

As described above, in the technical solution provided in the present application, the power supply system integrated control device includes at least one battery charging and discharging circuit. Correspondingly, if the operation signal of at least one battery charging and discharging circuit in the system is judged to be valid, the first target voltage corresponding to the battery charging and discharging circuit with the valid current operation signal is further calculated.

The first target voltage is a direct current voltage value required to be output by the battery charging and discharging circuit. Specifically, the first target voltage may be set according to at least one of a configuration parameter of a hardware circuit configuration of the battery charging and discharging circuit, a parameter of the battery charging and discharging circuit, and a processing circuit instruction. Specifically, the calculation process of the first target voltage may refer to the following embodiment corresponding to fig. 11.

S840: and controlling at least one battery charging and discharging circuit to output a first power supply signal corresponding to the first target voltage according to the first target voltage so as to charge the corresponding battery or discharge the battery in a matched manner.

After the first target voltage is obtained through calculation, at least one battery charging and discharging circuit is further controlled to output a first power supply signal corresponding to the first target voltage according to the first target voltage obtained through calculation, and then the corresponding battery is charged or the battery is matched for discharging.

In another embodiment, when the power system includes two sets of batteries, the corresponding set of batteries includes two battery charging and discharging circuits, and the power system integrated control device includes two sets of rechargeable batteries, the processing circuit includes a first controller, a second controller and a third controller, where the first controller is a main controller, the second controller and the third controller are general controllers, control ends of the second controller and the third controller are respectively connected with the first controller, output ends of the second controller and the third controller are respectively connected with one set of rechargeable batteries, and the second controller and the third controller are used to respectively control the corresponding (or connected) batteries to be charged or discharged under the control of the first controller. Specifically, after the first controller determines that the operation signal of the battery charging and discharging circuit is valid, and calculates and obtains a first target voltage corresponding to at least one battery charging and discharging circuit, the second controller and/or the third controller may be controlled to control the corresponding battery charging and discharging circuit to output a first power signal corresponding to the first target voltage according to the calculated first target voltage, so as to charge the corresponding battery or discharge the battery in cooperation with the corresponding battery. It should be noted that, in the technical solution provided in the present application, the battery included in the power system integrated control device is a rechargeable battery, the first controller corresponds to the above first processing chip, the second controller corresponds to the above second processing chip, and the third controller corresponds to the above third processing chip.

Correspondingly, if the integrated control device of the power system includes two batteries and two sets of battery charging and discharging circuits, and only one set of battery charging and discharging circuit needs to be charged according to actual needs, then only the corresponding battery charging and discharging circuit is controlled to charge the battery that needs to be charged in step S840. In another embodiment, when the battery charging/discharging circuit is controlled by a separate controller, the main controller controls the general controller corresponding to the battery charging/discharging circuit to be charged to control the corresponding battery charging/discharging circuit in step S840, so as to charge the battery to be charged.

The technical solutions provided by the present application are not limited to the technical solutions illustrated in the above embodiments, the power system integrated control device only includes two sets of rechargeable batteries, and the corresponding processing circuit only includes the second controller and the third controller for controlling the battery charging and discharging circuit, in other embodiments, the power system integrated control device may also include three sets of rechargeable batteries according to the actual application requirement, and correspondingly, the processing circuit also includes the second controller, the third controller and the fourth controller. At this time, after the first controller calculates the first target voltage corresponding to the at least one battery charging and discharging circuit obtained by the first controller, the first controller respectively controls the second controller, the third controller and/or the fourth controller to control the corresponding battery charging and discharging circuit to output a first power supply signal corresponding to the first target voltage. The first controller may simultaneously control any one or more of the second controller, the third controller and the fourth controller, so that any one or more of the second controller, the third controller and the fourth controller correspondingly controls the corresponding battery charging and discharging circuit to output a first power signal, so as to charge the corresponding battery or discharge the battery. It should be noted that, it is not limited herein that each processing circuit controls the time length for charging the battery by the corresponding battery charging and discharging circuit, and each controller may control to stop charging until the battery is fully charged.

It can be understood that, in another embodiment, the first controller may simultaneously control any one or more of the second controller, the third controller and the fourth controller, so that any one or more of the second controller, the third controller and the fourth controller correspondingly controls the respective battery charging and discharging circuits, and respectively outputs the first power signals with different voltage values, so as to respectively charge the corresponding battery charging and discharging circuits or cooperate with the battery to discharge externally.

The integrated control method for a power system provided in fig. 8 of the present application first determines whether the power system meets a power-on condition when a power-on command is obtained, and after judging that the power supply system meets the power-on condition, further switching the state of the system into a power-on preparation state and then judging whether the operation signal of at least one battery charging and discharging circuit in the system is effective or not, and further calculating a first target voltage corresponding to the at least one battery charging and discharging circuit when the operation signal of the at least one battery charging and discharging circuit is judged to be valid, then controlling at least one battery charging and discharging circuit to output a first power supply signal corresponding to the first target voltage according to the first target voltage, the charging circuit is used for charging the corresponding battery charging and discharging circuit or is matched with the battery to discharge outwards, so that accurate and efficient integrated control over the power supply system is better realized.

Further, please refer to fig. 9, fig. 9 is a schematic flowchart illustrating another embodiment of an integrated control method for a power system according to the present application.

After the power-on instruction is obtained in step S810, the method provided by the present application further includes:

s901: and switching the state of the system to a power-on ready state.

After the power-on instruction is acquired, the state of the power supply system is further switched to a power-on ready state. The power-on ready state is different from the power-on ready state and is a state in which the integrated control device of the power system can be ready to be powered on but whether the operation signal of the battery charging and discharging circuit is valid or not is not determined.

The step S810 of determining whether the power system satisfies the power-on condition further includes steps S902 to S904.

S902: and judging whether at least one battery charging and discharging circuit meets the requirement of software hardware consistency.

In the technical scheme provided by the application, the power supply system comprises at least one battery charging and discharging circuit, and different physical addresses are preset in the system correspondingly by different battery charging and discharging circuits. When controlling the battery charging and discharging circuit or sending a control command to the battery charging and discharging circuit, the control command needs to be sent according to a physical address. Therefore, before the system is powered on, it is necessary to first verify whether a physical address in a software program for controlling the battery charging and discharging circuit is consistent with a physical address configured for the battery charging and discharging circuit hardware in advance, and then judge whether the battery charging and discharging circuit meets the requirement of software hardware consistency.

Further, please refer to fig. 10, where fig. 10 is a schematic flowchart illustrating a power system integrated control method according to another embodiment of the present application. The step S902 of determining whether at least one battery charging/discharging circuit meets the requirement of software and hardware consistency further includes:

s1001: and acquiring a physical address of hardware corresponding to at least one battery charging and discharging circuit and a physical address included in a software program.

When judging whether at least one battery charging and discharging circuit meets the requirement of software hardware consistency, firstly, a physical address of hardware pre-configured by at least one battery charging and discharging circuit and a physical address included in a software program for controlling the battery charging and discharging circuit are required to be acquired. In the technical scheme provided by the application, the physical address of the hardware corresponding to each battery charging and discharging circuit has uniqueness.

S1002: it is determined whether the physical address of the hardware matches a physical address included in the software program.

After acquiring a physical address of hardware pre-configured by at least one battery charging and discharging circuit and a physical address included in a software program for controlling the battery charging and discharging circuit, further comparing the acquired physical address of the hardware with the physical address included in the software program to judge whether the physical address of the battery charging and discharging circuit in the acquired software control program is matched with a physical address of the hardware pre-configured for the battery charging and discharging circuit, if so, judging that the acquired battery charging and discharging circuit conforms to the consistency of the software and the hardware, otherwise, judging that the battery charging and discharging circuit does not conform to the consistency of the software and the hardware. In other embodiments, it may also be understood that whether the physical address of the hardware is the same as the physical address included in the software program is determined, if so, the two are determined to be matched, otherwise, the two are determined to be not matched.

S1003: and if so, judging that at least one battery charging and discharging circuit meets the requirement of software hardware consistency.

If the physical address of the battery charging and discharging circuit in the acquired control program is judged to be matched with the physical address of the battery charging and discharging circuit configured in advance, at least one battery charging and discharging circuit is judged to meet the requirement of software hardware consistency, and the following step S903 is further executed.

On the contrary, if the obtained physical address of the hardware corresponding to the same battery charging and discharging circuit is different from the physical address included in the software program, the battery charging and discharging circuit is judged to be not in accordance with the consistency requirement of the software hardware, the dial error in the software program is further judged to be obtained, and the state of the power supply system is correspondingly switched to the system fault state so as to inform a user of overhauling the system.

S903: if yes, further judging whether the buffer state of the battery charging and discharging circuit is normal.

And if the at least one battery charging and discharging circuit meets the requirement of software hardware consistency, further judging whether the buffer state of the at least one battery charging and discharging circuit is normal. In one embodiment, whether the buffer state of the battery charging and discharging circuit is normal can be determined through pre-buffering. Specifically, whether the buffer state of the battery charging and discharging circuit is normal can be judged by judging whether a contactor in the battery charging and discharging circuit can be normally closed, if the contactor is normally closed, the buffer state of the battery charging and discharging circuit is judged to be normal, otherwise, if the contactor cannot be normally closed, the buffer state of the battery charging and discharging circuit is judged to be abnormal.

S904: and if the buffer state of the battery charging and discharging circuit is judged to be normal, judging that the obtained system meets the power-on condition.

If the buffer state of the battery charging and discharging circuit is determined to be normal through the step S903, it is further determined that the current power supply system meets the power-on condition. Further, the power supply system is switched to an electrifying preparation state, otherwise, if the buffer state of at least one battery charging and discharging circuit is judged to be abnormal, the system is judged not to meet the electrifying condition, and the system is switched to a fault state. In another embodiment, when the power system includes a plurality of battery charging/discharging circuits, the power system is switched to a fault state when it is determined that there is an abnormal buffer state of one battery charging/discharging circuit. And only if the buffer states of all the battery charging and discharging circuits are judged to be normal, the system can be judged to meet the power-on condition.

Referring to fig. 11, fig. 11 is a schematic flowchart illustrating a power system integrated control method according to another embodiment of the present application. In the present embodiment, the power-on command includes a value of a target bus voltage, where it should be noted that the target value of the bus voltage is a voltage corresponding to the bus when the battery charging and discharging circuit is charged. In the present embodiment, the calculating the target voltage corresponding to the at least one battery charging/discharging circuit in step S830 further includes:

s1101: and sampling to obtain the current bus voltage.

When calculating the target voltage corresponding to at least one battery charging and discharging circuit, firstly sampling the current bus voltage. Specifically, the bus voltage can be sampled by a sensor, or the bus voltage can be obtained by collecting the voltages at the two ends of the bus and calculating the voltage difference value at the two ends of the bus.

S1102: and calculating the target current of at least one battery charging and discharging circuit according to the current bus voltage and the target bus voltage.

And analyzing the electrifying command, acquiring the bus voltage included in the electrifying command, and calculating and solving the target current of at least one battery charging and discharging circuit according to the current bus voltage and the target bus voltage. The target current of the flow conversion unit is a current value corresponding to the battery charging and discharging circuit when the bus voltage reaches the target bus voltage.

When the power supply system includes a plurality of battery charging/discharging circuits, the target current corresponding to all the battery charging/discharging circuits in the power supply system is calculated in step S1102.

S1103: and sampling to obtain the current of the current battery charging and discharging circuit, and calculating to obtain the target voltage according to the target current and the current of the current battery charging and discharging circuit.

And sampling to obtain the current value in the current battery charging and discharging circuit, and calculating to obtain the target voltage according to the target current and the current of the current battery charging and discharging circuit. Wherein, battery charge and discharge circuit includes the power tube, and according to the first power supply signal of target voltage output corresponding target voltage of at least one battery charge and discharge circuit of target voltage control, further include for corresponding battery charging or discharging: and controlling the power tube to output a first power supply signal corresponding to the target voltage according to the target voltage. When the first power signal is an electrical signal for charging the battery, the first power signal flows from the battery charging and discharging circuit to the battery, and conversely, when the first power signal is a battery discharging signal, the first power signal flows from the battery and is an electrical signal processed by the battery charging and discharging circuit.

In an embodiment, in the technical scheme provided by the present application, a main controller in the integrated control device of the power supply system includes two paths of CAN communications, an external CAN communicates with a PLC, the main controller CAN directly sample a bus voltage, then calculate and obtain a target current of a battery charging and discharging circuit according to the bus voltage obtained by sampling and a target bus voltage input by an upper computer, then obtain a current control instruction of each path of DC-DC unit (i.e., the DC-DC module described above), transmit the current control instruction to each DC-DC unit through the internal CAN, receive the current control instruction by an ordinary controller corresponding to the DC/DC unit, sample a unit current, and then calculate and obtain an output target voltage according to the current control instruction and a current sampling result. And the common controller modulates the target voltage to obtain a power tube drive control instruction and sends the power tube drive control instruction to the power tube, so that the power tube responds to the drive control instruction to complete target voltage output.

Further, referring to fig. 12, the power system integrated control method provided by the present application further includes the following steps illustrated in fig. 12, where fig. 12 is a schematic flow chart in another embodiment of the power system integrated control method provided by the present application.

S1201: it is detected whether the battery needs to be started to supply power to the external load.

In the process of controlling the power supply, the method provided by the application further comprises the step of further detecting whether the battery needs to be started to supply power to the external load. In some embodiments, the battery is used as a backup power source for the external load, and when a fault of the external power source is detected or a circuit fault occurs between the external power source and the rectifying circuit, it is determined that the battery needs to be started to supply power to the external load currently. In other embodiments, it may be determined that the battery needs to be started to supply power to the external load when receiving an instruction sent by the user to start the battery to supply power to the external load.

S1202: if yes, the battery charging and discharging circuit is controlled to discharge in coordination with the battery so as to supply power to an external load.

If the battery charging and discharging circuit needs to be started to supply power to the external load through detection, the battery charging and discharging circuit is controlled to be started, so that the battery charging and discharging circuit is matched with the battery to discharge power, and then the power is supplied to the external load. In other embodiments, the battery charging/discharging circuit may be controlled to switch from the charging mode to the discharging mode, so as to convert the current output by the battery into a direct current meeting the rated voltage requirement of the external load, and output the direct current to the direct current conversion module or the direct current output port, thereby supplying power to the external load. At this time, when the battery charge/discharge circuit is started, the external grid power supply stops charging the battery charge/discharge circuit, and also stops supplying power to the external load.

Specifically, the main controller may control the general controller, so that the general controller controls the battery charging and discharging circuit to start or switch to the discharging mode, and further cooperate with the battery to discharge, so as to supply power to the external load.

Referring to fig. 13, fig. 13 is a schematic flowchart illustrating a power system integrated control method according to another embodiment of the present application. In another embodiment, the power system further includes at least one dc-to-ac module, and the at least one dc-to-ac module is controlled by the processing circuit, and the method provided by the present application further includes:

s1301: and detecting whether the operation signal of the direct current-to-alternating current module is effective or not.

In the operation process of the integrated control device of the power system, when the direct current to alternating current module is controlled to be started, the method provided by the application further comprises the following steps: and detecting whether the operation signal of the direct current-to-alternating current module is effective or not. As in one embodiment, it may be determined whether the dc to ac operating signal is active by sending a test signal. If the test signal can be normally received, the operation signal of the direct current-to-alternating current module is determined to be effective. In another embodiment, detecting whether the operation signal of the dc-to-ac module is valid comprises: and judging whether the direct current-to-alternating current module can normally receive the electric signal, judging whether the direct current-to-alternating current module can normally convert the electric signal, and judging whether the direct current-to-alternating current module converts the flowing electric signal into at least one of alternating currents with set parameters according to a control instruction.

S1302: if yes, further detecting whether the bus voltage is larger than or equal to a set threshold value.

And if the operation signal of the direct current-to-alternating current module is effective after detection, further detecting whether the current bus voltage is greater than or equal to a set threshold value. The bus voltage can be obtained through detection of a sensor, or can be determined through testing the voltage difference between two ends of the bus, the set threshold is a voltage value preset according to an empirical value, the set threshold is correspondingly set according to a bus voltage value corresponding to the operation of the direct current-to-direct current module, and the set threshold can be specifically set according to actual requirements.

If the bus voltage is detected to be greater than or equal to the set threshold, the following step S1403 is executed, otherwise, if the bus voltage detected to be less than the set threshold is detected, it is determined that the battery charging and discharging circuit needs to be started to discharge in cooperation with the battery, so as to supply power to the external load. Specifically, when the detected bus voltage is smaller than the set threshold, the battery charging and discharging circuit is controlled to enter a discharging mode, the direct current output by the battery is boosted by matching with the battery, and the boosted direct current is output to the direct current-to-direct current module or the direct current output port to supply power for an external load.

S1303: and if the bus voltage is greater than or equal to the set threshold, acquiring a target parameter of the direct current-to-alternating current module, and generating a driving instruction corresponding to the target parameter.

Wherein the target parameter includes at least one of an output voltage and an output frequency. Further, the target parameter may be sent to the power system integrated control device by the upper computer according to the rated parameter of the external load, so that the dc-to-ac module may convert the dc power into the ac power conforming to the rated parameter of the external load.

In an embodiment, in order to protect a circuit structure in the dc-to-ac module, in a process of outputting a driving command to the dc-to-ac module so that the dc-to-ac module responds to the driving command and further outputs an electrical signal corresponding to a target parameter to an external load, the method provided by the present application further includes: and monitoring whether the output current of the direct current-to-alternating current module is greater than or equal to a second preset threshold value. And the second preset threshold is a preset current threshold used for triggering an overcurrent suppression protection algorithm.

Further, if the output current of the direct current-to-alternating current module obtained through monitoring is larger than or equal to a second preset threshold value, an overcurrent suppression protection algorithm is triggered to suppress the output current. When the output current of the DC-to-AC module is larger than or equal to the second threshold value, the overcurrent suppression protection algorithm is started, so that the output current of the DC-to-AC module is smaller than the second threshold value, the circuit structure can be well protected, and a transformer load or other related unit structures can be normally put into a circuit.

For example, in an embodiment, during the power-on start-up process, a transformer load may be put into the circuit, and a relatively large inrush current may be generated, for example, if a control current is not added to protect the circuit, the structure of the dc-ac module may be damaged or the related unit structure of the circuit may not be put into normal use. Therefore, an overcurrent suppression algorithm is triggered at the moment, and the fault triggered by the impact current is avoided, so that the requirement of starting the load of the transformer is met. Further, as described above, the dc-to-ac module includes three sets of switching legs connected in parallel, and the legs include two SiC MOS switches connected in series.

Further, after the target parameters of the direct current-to-alternating current module are acquired, flexible processing is performed, so that the output voltage and the output frequency gradually rise until the values set by the upper computer are reached. Further, in the course of flexibly processing the output voltage and the output frequency, the changes of the output voltage and the output frequency are linear changes.

S1304: and outputting the driving instruction to the direct current-to-alternating current module so that the direct current-to-alternating current module responds to the driving instruction and further outputs an electric signal corresponding to the target parameter to an external load.

The method comprises the steps of firstly obtaining target parameters of an AC-DC conversion unit, generating driving instructions corresponding to the target parameters, then outputting the driving instructions to a DC-AC conversion module, enabling the DC-AC conversion module to respond to the driving instructions, and further outputting electric signals corresponding to the target parameters to an external load. Wherein, the target parameter of the AC-DC conversion module at least comprises: at least one of an output voltage and an output frequency.

Further, when the master controller controls the dc-to-ac module, steps S1303 to S1304 include: if the main controller judges that the obtained bus voltage is larger than or equal to the set threshold value, the target parameter of the direct current-to-alternating current module sent by the upper computer is obtained, a driving instruction corresponding to the target parameter is generated, and the driving instruction is output to the direct current-to-alternating current module.

Referring to fig. 14, fig. 14 is a schematic structural diagram of an embodiment of an integrated control device of a power system according to the present application. In the present embodiment, the power system integrated control device 1400 provided by the present application includes a processor 1401, a memory 1402, and a communication circuit 1403 coupled, and the memory 1402 and the communication circuit 1403 are respectively coupled to the processor 1401. The power system integrated control apparatus 1400 may perform the power system integrated control method described in any one of the embodiments of fig. 8 to fig. 13 and corresponding embodiments thereof.

The communication circuit 1403 communicates with an external terminal device or an upper computer under the control of the processor 1401 to perform data interaction.

The memory 1402 includes a local storage (not shown) and stores a computer program, which can implement the method described in any of the embodiments of fig. 8-13 and corresponding embodiments thereof when executed.

A processor 1401 is coupled to the memory 1402, and the processor 1401 is configured to run a computer program to execute the power system integration control method described in fig. 8 to fig. 13 and any corresponding embodiment thereof.

Referring to fig. 15, fig. 15 is a schematic structural diagram of an embodiment of a computer-readable storage medium according to the present application. The computer-readable storage medium 1500 stores a computer program 1501 capable of being executed by a processor, the computer program 1501 being used to implement the method of power supply system integrated control described above in fig. 8 to 13 and any of the corresponding embodiments thereof. Specifically, the storage medium 1500 may be one of a memory, a personal computer, a server, a network device, or a usb disk, and is not limited in any way herein.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A power supply system integrated control apparatus, at least for controlling a plurality of power supply systems, for outputting a set power supply signal to an external load, the apparatus comprising: a processing circuit and a power supply circuit;

the output end of the processing circuit is connected with the control end of the power supply circuit, the output end of the power supply circuit is connected with an external load, and the power supply circuit outputs the power supply signal to the external load under the control of the processing circuit;

the power supply circuit comprises a rectifying circuit, an inverter circuit and a battery charging and discharging circuit, wherein the input end of the rectifying circuit is connected with an external power supply end, the output end of the rectifying circuit is respectively connected with the input end of the inverter circuit and the battery charging and discharging circuit, the input end of the inverter circuit is connected with the battery charging and discharging circuit, and the output end of the inverter circuit is connected with the driving end of the external load so as to output the power supply signal to the external load under the control of the processing circuit;

the inverter circuit comprises two groups of direct current-to-current modules which are connected in parallel, the direct current-to-current modules comprise three groups of switch bridge arms which are connected in parallel, and the bridge arms comprise two SiC MOS switches which are connected in series.

2. The apparatus of claim 1, wherein the battery charging/discharging circuit comprises at least one DC-DC module, a third terminal of each DC-DC module is connected to an external battery, and a fourth terminal of each DC-DC module is connected to an input terminal of the DC-to-ac module and an output terminal of the rectifying circuit, respectively.

3. The apparatus of claim 2, wherein the processing circuit comprises a first processing chip, a second processing chip and a third processing chip capable of communicating with each other, an output of the first processing chip is connected to control terminals of two sets of the DC-to-ac modules, and the second processing chip and the third processing chip are respectively connected to one of the DC-DC modules.

4. The apparatus of claim 1, wherein the power circuit further comprises a dc output port, and the dc output port is respectively connected to the output terminal of the rectifying circuit and the second terminal of the battery charging and discharging circuit to output a dc power signal to the external load.

5. The apparatus of claim 1, wherein the power circuit further comprises a filter capacitor connected to the output of the rectifier circuit, the filter capacitor being connected to the positive and negative buses for filtering the high voltage dc output from the rectifier circuit.

6. The apparatus of claim 5, wherein the power circuit further comprises a snubber circuit, the snubber circuit connecting the rectifier circuit and the filter capacitor to protect the filter capacitor.

7. The apparatus of claim 6, wherein the snubber circuit comprises a protection resistor and a relay switch arranged in parallel, a control terminal of the relay switch being connected to the processing circuit to be closed or opened under control of the processing circuit.

8. The apparatus of claim 1, wherein the power circuit further comprises a filter circuit, and the filter circuit is connected to the inverter circuit and the external load to filter the power signal output to the external load.

9. The apparatus of claim 1, wherein the power system integrated control apparatus further comprises an electromagnetic compatibility circuit and a lightning protection circuit, the electromagnetic compatibility circuit and the lightning protection circuit connecting the external power supply and the rectification circuit to provide lightning protection for the power circuit.

10. The apparatus of claim 1, further comprising a heat dissipation module and two sets of reactors, one of the reactors connecting the output terminal of the inverter circuit and the first filter circuit, the other reactor connecting the battery charging/discharging circuit and the second filter circuit, the heat dissipation module comprising a flow guide channel for flowing a cooling fluid, wherein one side of the flow guide channel abuts against at least one of the dc-to-ac module, the battery charging/discharging circuit and the two sets of reactors.

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